diff --git a/sentry_sdk/integrations/anthropic.py b/sentry_sdk/integrations/anthropic.py
index 87e69a3113..a41005ed20 100644
--- a/sentry_sdk/integrations/anthropic.py
+++ b/sentry_sdk/integrations/anthropic.py
@@ -7,6 +7,7 @@
 from sentry_sdk.integrations import DidNotEnable, Integration
 from sentry_sdk.scope import should_send_default_pii
 from sentry_sdk.utils import (
+    _serialize_span_attribute,
     capture_internal_exceptions,
     event_from_exception,
     package_version,
@@ -126,7 +127,7 @@ def _add_ai_data_to_span(
             complete_message = "".join(content_blocks)
             span.set_data(
                 SPANDATA.AI_RESPONSES,
-                [{"type": "text", "text": complete_message}],
+                _serialize_span_attribute([{"type": "text", "text": complete_message}]),
             )
         total_tokens = input_tokens + output_tokens
         record_token_usage(span, input_tokens, output_tokens, total_tokens)
@@ -165,11 +166,16 @@ def _sentry_patched_create_common(f, *args, **kwargs):
         span.set_data(SPANDATA.AI_STREAMING, False)
 
         if should_send_default_pii() and integration.include_prompts:
-            span.set_data(SPANDATA.AI_INPUT_MESSAGES, messages)
+            span.set_data(
+                SPANDATA.AI_INPUT_MESSAGES, _serialize_span_attribute(messages)
+            )
 
         if hasattr(result, "content"):
             if should_send_default_pii() and integration.include_prompts:
-                span.set_data(SPANDATA.AI_RESPONSES, _get_responses(result.content))
+                span.set_data(
+                    SPANDATA.AI_RESPONSES,
+                    _serialize_span_attribute(_get_responses(result.content)),
+                )
             _calculate_token_usage(result, span)
             span.__exit__(None, None, None)
 
diff --git a/tests/integrations/anthropic/test_anthropic.py b/tests/integrations/anthropic/test_anthropic.py
index 8ce12e70f5..4a7d7ed458 100644
--- a/tests/integrations/anthropic/test_anthropic.py
+++ b/tests/integrations/anthropic/test_anthropic.py
@@ -19,7 +19,7 @@ async def __call__(self, *args, **kwargs):
 from anthropic.types.message_delta_event import MessageDeltaEvent
 from anthropic.types.message_start_event import MessageStartEvent
 
-from sentry_sdk.utils import package_version
+from sentry_sdk.utils import _serialize_span_attribute, package_version
 
 try:
     from anthropic.types import InputJSONDelta
@@ -115,10 +115,12 @@ def test_nonstreaming_create_message(
     assert span["data"][SPANDATA.AI_MODEL_ID] == "model"
 
     if send_default_pii and include_prompts:
-        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == messages
-        assert span["data"][SPANDATA.AI_RESPONSES] == [
-            {"type": "text", "text": "Hi, I'm Claude."}
-        ]
+        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == _serialize_span_attribute(
+            messages
+        )
+        assert span["data"][SPANDATA.AI_RESPONSES] == _serialize_span_attribute(
+            [{"type": "text", "text": "Hi, I'm Claude."}]
+        )
     else:
         assert SPANDATA.AI_INPUT_MESSAGES not in span["data"]
         assert SPANDATA.AI_RESPONSES not in span["data"]
@@ -183,10 +185,12 @@ async def test_nonstreaming_create_message_async(
     assert span["data"][SPANDATA.AI_MODEL_ID] == "model"
 
     if send_default_pii and include_prompts:
-        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == messages
-        assert span["data"][SPANDATA.AI_RESPONSES] == [
-            {"type": "text", "text": "Hi, I'm Claude."}
-        ]
+        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == _serialize_span_attribute(
+            messages
+        )
+        assert span["data"][SPANDATA.AI_RESPONSES] == _serialize_span_attribute(
+            [{"type": "text", "text": "Hi, I'm Claude."}]
+        )
     else:
         assert SPANDATA.AI_INPUT_MESSAGES not in span["data"]
         assert SPANDATA.AI_RESPONSES not in span["data"]
@@ -282,10 +286,12 @@ def test_streaming_create_message(
     assert span["data"][SPANDATA.AI_MODEL_ID] == "model"
 
     if send_default_pii and include_prompts:
-        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == messages
-        assert span["data"][SPANDATA.AI_RESPONSES] == [
-            {"type": "text", "text": "Hi! I'm Claude!"}
-        ]
+        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == _serialize_span_attribute(
+            messages
+        )
+        assert span["data"][SPANDATA.AI_RESPONSES] == _serialize_span_attribute(
+            [{"type": "text", "text": "Hi! I'm Claude!"}]
+        )
 
     else:
         assert SPANDATA.AI_INPUT_MESSAGES not in span["data"]
@@ -385,10 +391,12 @@ async def test_streaming_create_message_async(
     assert span["data"][SPANDATA.AI_MODEL_ID] == "model"
 
     if send_default_pii and include_prompts:
-        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == messages
-        assert span["data"][SPANDATA.AI_RESPONSES] == [
-            {"type": "text", "text": "Hi! I'm Claude!"}
-        ]
+        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == _serialize_span_attribute(
+            messages
+        )
+        assert span["data"][SPANDATA.AI_RESPONSES] == _serialize_span_attribute(
+            [{"type": "text", "text": "Hi! I'm Claude!"}]
+        )
 
     else:
         assert SPANDATA.AI_INPUT_MESSAGES not in span["data"]
@@ -515,10 +523,12 @@ def test_streaming_create_message_with_input_json_delta(
     assert span["data"][SPANDATA.AI_MODEL_ID] == "model"
 
     if send_default_pii and include_prompts:
-        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == messages
-        assert span["data"][SPANDATA.AI_RESPONSES] == [
-            {"text": "", "type": "text"}
-        ]  # we do not record InputJSONDelta because it could contain PII
+        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == _serialize_span_attribute(
+            messages
+        )
+        assert span["data"][SPANDATA.AI_RESPONSES] == _serialize_span_attribute(
+            [{"type": "text", "text": ""}]
+        )  # we do not record InputJSONDelta because it could contain PII
 
     else:
         assert SPANDATA.AI_INPUT_MESSAGES not in span["data"]
@@ -652,10 +662,12 @@ async def test_streaming_create_message_with_input_json_delta_async(
     assert span["data"][SPANDATA.AI_MODEL_ID] == "model"
 
     if send_default_pii and include_prompts:
-        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == messages
-        assert span["data"][SPANDATA.AI_RESPONSES] == [
-            {"text": "", "type": "text"}
-        ]  # we do not record InputJSONDelta because it could contain PII
+        assert span["data"][SPANDATA.AI_INPUT_MESSAGES] == _serialize_span_attribute(
+            messages
+        )
+        assert span["data"][SPANDATA.AI_RESPONSES] == _serialize_span_attribute(
+            [{"type": "text", "text": ""}]
+        )  # we do not record InputJSONDelta because it could contain PII
 
     else:
         assert SPANDATA.AI_INPUT_MESSAGES not in span["data"]
@@ -667,6 +679,7 @@ async def test_streaming_create_message_with_input_json_delta_async(
     assert span["data"]["ai.streaming"] is True
 
 
+@pytest.mark.forked
 def test_exception_message_create(sentry_init, capture_events):
     sentry_init(integrations=[AnthropicIntegration()], traces_sample_rate=1.0)
     events = capture_events()